diff --git a/dnsapi/dns_czechia.sh b/dnsapi/dns_czechia.sh
index 74321b56..1fb20af1 100644
--- a/dnsapi/dns_czechia.sh
+++ b/dnsapi/dns_czechia.sh
@@ -21,10 +21,9 @@ dns_czechia_add() {
     return 1
   fi
 
-  # Normalizace zóny pro URL (bez tečky na konci)
-  _current_zone=$(printf "%s" "$_current_zone" | tr -d '[:space:]' | _lower_case | sed 's/\.$//')
-  _encoded_zone=$(_unicode_url_encode "$_current_zone")
-  _url="$CZ_API_BASE/api/DNS/$_encoded_zone/TXT"
+  # Totální očista zóny (povolena jen malá písmena, čísla, tečky a pomlčky)
+  _current_zone=$(printf "%s" "$_current_zone" | _lower_case | sed 's/[^a-z0-9.-]//g; s/\.$//')
+  _url="$CZ_API_BASE/api/DNS/$_current_zone/TXT"
 
   _fd=$(echo "$fulldomain" | _lower_case | sed 's/\.$//')
   _cz=$(echo "$_current_zone" | _lower_case | sed 's/\.$//')
@@ -53,9 +52,9 @@ dns_czechia_rm() {
   _current_zone=$(_czechia_pick_zone "$fulldomain")
   [ -z "$_current_zone" ] && return 1
 
-  _current_zone=$(printf "%s" "$_current_zone" | tr -d '[:space:]' | _lower_case | sed 's/\.$//')
-  _encoded_zone=$(_unicode_url_encode "$_current_zone")
-  _url="$CZ_API_BASE/api/DNS/$_encoded_zone/TXT"
+  # Totální očista zóny
+  _current_zone=$(printf "%s" "$_current_zone" | _lower_case | sed 's/[^a-z0-9.-]//g; s/\.$//')
+  _url="$CZ_API_BASE/api/DNS/$_current_zone/TXT"
 
   _fd=$(echo "$fulldomain" | _lower_case | sed 's/\.$//')
   _cz=$(echo "$_current_zone" | _lower_case | sed 's/\.$//')